The Best Email Aps for Macs and PCs

i've been stubborn for too long waiting for the perfect email ap across all platforms. Most of my emal work happens at my mack, so even if i'm not sitting at my desk, i have that available to me wherever i happen to be. I like mim stream so much that even though it's a bata still on the mack, that i really wanted to give it a fair shotand make it the centre of the process. And then with the rest of it, i'm still using spark. Spark has the great sharing features that you and i used to share our email. When you know one of us isn't on a particular email, we can discuss it in